Endoscope-Assisted Rigid Fixation for Intraoral Vertical Subsigmoid Osteotomy: A Preliminary Clinical Study

Abstract

To illustrate the clinical technique of endoscope-assisted rigid fixation in intraoral vertical subsigmoid osteotomy and to report on early postoperative morbidities. Six patients presenting with Class III skeletal profile were recruited. The osteotomy was performed through an intraoral route. Rigid fixation was achieved with a 3-mm stab incision located inferior to the ear pinna, allowing access to the transbuccal trocar. A rigid endoscope was introduced intraorally to improve visibility during fixation. Each patient's preoperative and 3-month postoperative radiographs and clinical morbidities (neurosensory status and temporomandibular joint function) were assessed. Most patients (83.3%) fully recovered inferior alveolar nerve function, and 66.6% recovered temporomandibular joint function. The scar from the stab incision was effectively camouflaged by the ear pinna and was not noticeable to the patients. This preliminary study confirms that the application of endoscope-assisted rigid fixation in intraoral vertical subsigmoid osteotomy is clinically feasible. All patients presented with minimal clinical morbidities and good stability at the early postoperative period.